After defeating Amorbis, Samus retakes Agon's portion of the Light of Aether and returns to the Agon Temple, where she injects the energy into the Energy Controller. Immediately, the system reacts, improving weather conditions and refracting a ray of light through a lens, focusing the light into a beam that is directed all the way back to the Main Energy Controller, where U-Mos witnesses its light. I-Sha's hologram appears for the final time to bow in thanks to Samus.

After Samus restores the Light of Aether to the Agon, Torvus, and Sanctuary Temples, and talks to U-Mos, she can access Aether's Light-Based Teleportation System and instantly teleport among the four Energy Controllers using the Light Suit.

References

↑"Object analysis complete. This is a regional Energy Controller. Unit regulates planetary energy in this sector, and is linked to a global energy network." —Scan Data (Metroid Prime 2: Echoes)

↑"Welcome. I am I-Sha, Sentinel of the Agon Temple. This message survives my death, as guidance to one who would fight the Ing. A portal to Dark Aether lies nearby. With it, you can travel to this land's shadow. You must locate a Dark Temple, a twisted mockery of this sacred place. Inside you will find the Energy Controller you seek. The temple door is held fast by three locks. The keys for the locks are hidden throughout that dark land. Your search will be difficult. Even the very air of Dark Aether is dangerous, and can cripple the strongest of warriors." —I-Sha (Metroid Prime 2: Echoes)

↑"In our past struggles with the Ing, we placed a series of Light Crystals throughout their world. They remain today. These Crystals create safe areas that will protect you from the harmful atmosphere of the dark world. I have updated your Translator Module. You can access devices and doors coded with Amber holograms. More lands are open to explore. When you have taken the energy from the Dark Temple, return here at once. May the Light of Aether serve you well!" —I-Sha (Metroid Prime 2: Echoes)

↑"Seek the dark shadow of this sacred place soon. Remember: even the air of Dark Aether can kill. Do not hesitate to use the Light Crystals." —I-Sha (Metroid Prime 2: Echoes)